Machine center



FIG. 1 is a perspective view of the machine center showing the present design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a left side view thereof.

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view of thereof. 

CLAIM The ornamental design for machine center, as shown and described. 